Van bi lệch tâm API607, van bi lệch tâm gắn trên
Worm Gear Eccentric Ball Valve; Top-Entry Eccentric Ball Valve Design Standards:
Design and manufacturing standards conform to: GB12237—1989, ASME B16.34, API 6D General Purpose Valve Flanges and Butt-Welded Steel Ball Valves
Structural length conforms to: GB12221, ASME B16.10;
Connection end dimensions conform to: JB/T79, GB9113, HG20592; ASME.B-16.5A, ASME B16.25;
Inspection and testing conform to: JB/T 9092, GB/T13927-1992, API 598; General Purpose Valve Pressure Test
Fire protection design conforms to: API 607;
Van bi lệch tâm API607, van bi lệch tâm gắn trên
Worm gear eccentric ball valves are categorized by application into six major series: general-purpose valves, pipeline valves, slurry-specific valves, gas-specific valves, petrochemical-specific valves, and pulverized coal injection-specific valves. They are available in manual, khí nén, and electric operation, with eight pressure ratings (PN0.25～10.0Mpa) and hundreds of specifications (40～1000). These valves are a replacement for gate valves, van cầu, Y-type valves, and ball valves in the petroleum, hóa chất, metallurgical, power, and gas industries. Currently, they are widely used in pulverized coal injection in the steel industry, slurry, mother liquor, and alumina powder conveying in the alumina industry, hydraulic (or dry) ash removal in the power industry, and in the petrochemical and gas industries.
Worm Gear Eccentric Hemispherical Valve Applications of Top-Mounted Eccentric Hemispherical Valve
General Purpose Valve: Reasonably designed and compact in structure, it features low flow resistance, good sealing performance, and easy and flexible operation. It is particularly suitable for low-pressure pipelines carrying media such as water, sewage, hơi nước, and pulp. It can be equipped with electric or pneumatic devices for remote automated operation. (For non-corrosive media such as water, hơi nước, sewage, pulp, and slurry)
Pulverized Coal Injection Valve: An ideal device for controlling the solid conveying of dust-laden gases and particulate fluids, such as pulverized coal injection. It is widely used in various pipeline controls in blast furnace pulverized coal injection, pulverizing systems, and dust removal systems in metallurgical, mineral processing, and power production processes. It adopts a straight-through structure, ensuring smooth flow and preventing ash accumulation and blockage. The sealing pair is made of Co-Cr-W alloy material and undergoes special heat treatment, making the valve resistant to erosion and wear. The eccentric spherical surface of the valve has automatic compensation performance; by adjusting the bolts on the worm gear, the sealing pair can still achieve a re-sealing effect even under a certain degree of wear. (For dust-laden gases and particulate fluids)
Worm Gear Eccentric Ball Valve, Top-Entry Eccentric Ball Valve Applications:
Petrochemical Industry Special: Designed for high-pressure, high-temperature media in the petrochemical industry, filled with flammable, explosive, and easily corrosive media such as weak acids and alkalis. Features include excellent sealing, corrosion resistance, easy opening and closing, and automatic removal of scale from the valve surface. Suitable for transporting crude oil, heavy oil, and other media, as well as in petroleum cracking, food processing, and other processes. (Petroleum, natural gas, coal gas, Nước, vân vân.)
Blast Furnace Gas and Gas Special: The sealing pair is made of Cr-Mn-Si hard alloy, which is fire-resistant, explosion-proof, and anti-static. The sealing pair can withstand high temperatures up to 560℃. Its corrosion resistance and anti-galling ability are more than 6 times that of stainless steel sealing pairs. It is particularly suitable for use in pipeline transportation and pressurization stations for coal gas, coke oven gas, water gas, liquefied gas, and natural gas. (Blast furnace gas, natural gas, dust-laden gas, vân vân.) For slurry mixed fluids: The ideal process valve for conveying two-phase mixed fluid media such as easily precipitated, scaled, or crystallized slurries, slurry ash, vân vân. It can overcome scale obstacles to achieve smooth closure. It features a novel structure and unique design, offering advantages such as high efficiency and energy saving, good wear resistance, reliable sealing, easy operation, rapid opening and closing, and long service life. (Conveying process slurries, slurry ash, vân vân. containing particulate matter) For pipelines: A straight-through hemispherical valve with no reduction in diameter. The valve body channel connects to the pipeline in a straight line with the same cross-sectional area, resulting in less resistance than a reduced diameter valve. Full opening and full closing can be achieved with just a 90-degree rotation, facilitating long-distance pipeline transportation control. (Pulverized coal injection and gas transportation)
The worm gear eccentric hemispherical valve, specifically the top-mounted eccentric hemispherical valve, offers the following advantages:
1. Compact side-mounted structure and lightweight, suitable for applications requiring limited installation space.
2. Low fluid resistance; its resistance coefficient is equal to that of a pipe section of the same length.
3. Cấu trúc đơn giản, small size, and light weight.
4. Cutting function; it can cut off impurities (twigs, textile bags, vân vân.) in the medium when closed.
5. Chặt chẽ và đáng tin cậy; the sealing surface material of the ball valve widely uses plastics, providing excellent sealing performance, and it is also widely used in vacuum systems.
6. Convenient operation; rapid opening and closing; only a 90° rotation is needed from fully open to fully closed, facilitating remote control.
7. Easy maintenance; the ball valve has a simple structure, and the sealing rings are generally movable, making disassembly and replacement convenient.
8. Khi mở hoàn toàn hoặc đóng hoàn toàn, the sealing surfaces of the ball and seat are isolated from the medium, preventing erosion of the valve sealing surfaces during medium flow.
9. Nó có một loạt các ứng dụng, with pipe diameters ranging from a few millimeters to several meters, and can be used in applications ranging from high vacuum to high pressure. When the sphere rotates 90 degrees, the entire inlet and outlet should present a spherical surface, thereby cutting off the flow.
